package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import com.netflix.hystrix.contrib.javanica.utils.FallbackMethod;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 *
 * 服务提供端做降级处理：
 *
 *      可配置超时时长的降级处理
 *      可以设置接口出错的降级处理
 *
 * @author : zjj
 * @date : 2021/6/19 14:51
 */

@Service
@DefaultProperties(defaultFallback="defaultError")
public class PaymentService {


    /**
     * 正常访问
     * @param id        id
     * @return          结果
     */
    public String paymentInfo_OK(Integer id)
    {
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_OK,id: "+id+"\t"+"O(∩_∩)O";
    }

    /**
     * 超时访问，演示降级
     * @param id        id
     * @return          结果
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_Timeout_fallback"
                    ,commandProperties = {
            // 配置超时时长，超过时长就走降级的兜底方法
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="3000")
    })
    public String paymentInfo_TimeOut(Integer id)
    {
        // 出错的异常的演示
//        int i = 10/0;
        try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_TimeOut,id: "+id+"\t"+"O(∩_∩)O，耗费3秒";
    }

    public String paymentInfo_Timeout_fallback(Integer id){
        return "支付接口出现了异常，服务降级";

    }



    public String defaultError(){
        return "全局的降级处理逻辑======================";
    }

    //=========服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),
    })
    public String paymentCircuitBreaker(Integer id)
    {
        if(id < 0)
        {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id)
    {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }



}
